Police say a man brandishing a knife robbed a convenience store on Business Route 4 in Center Rutland Sunday night, and have released a photo of the suspect taken from the store's surveillance video. They are asking for the public's help in locating the robber. Vermont State Police say a man entered Mac's Market just before 10 p.m. and threatened a clerk while demanding money from the register. The robber, whose face was covered by a bandanna and sunglasses, then fled the store on foot running in an easterly direction, police said.No one was hurt in the incident.The robber was described as a white man, standing about 6 feet tall with a lean to average build. He was wearing a light blue hoodie with the numbers “802” in black on it. He wore black pants, black sneakers and knit gloves.Anyone with information about the incident is asked to call state police at 773-9101.